The Electro Harmonix 12AY7 is a current production valve made in Russia and suitable for amps that use the 12AY7.
These are premium and tested on specialised digital and analogue testing equipment by Karltone as follows
- Gain (A)
- Transconductance (gm)
- Noise (dbv)
- Emission Quality
- Grid Leakage
Test results are provided with purchase